document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=319340>Question 319340</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having a hard time understanding the difference between these two problems.\r<BR>\n" );
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document.write( "25. p^4 – 25<BR>\n" );
document.write( "  (p^2 – 5)(p^2 + 5)<BR>\n" );
document.write( "Ok, but\r<BR>\n" );
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document.write( "27. x^4 – 1<BR>\n" );
document.write( "(x^2 – 1)(x^2 + 1)<BR>\n" );
document.write( "Wrong, not factored enough?  Book says Factor again when any of the factors is a difference of squares.  Can you please explain what I am failing to grasp?\r<BR>\n" );
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document.write( "Thank you and I hope you have a wonderful 4th. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #228644 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=228644\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%5E2-5 ALIGN=MIDDLE  ALT=\"p%5E2-5\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-1 ALIGN=MIDDLE  ALT=\"x%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > are both example of a difference of squares. <BR>\n" );
document.write( "I'm not sure why the first one is OK, except that it doesn't factor to an integer.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28p%5E2-5%29=%28p-sqrt%285%29%29%28p%2Bsqrt%285%29%29 ALIGN=MIDDLE  ALT=\"%28p%5E2-5%29=%28p-sqrt%285%29%29%28p%2Bsqrt%285%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E2-1%29=%28x-1%29%28x%2B1%29 ALIGN=MIDDLE  ALT=\"%28x%5E2-1%29=%28x-1%29%28x%2B1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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